Book Image

OpenShift Multi-Cluster Management Handbook

By : Giovanni Fontana, Rafael Pecora
5 (1)
Book Image

OpenShift Multi-Cluster Management Handbook

5 (1)
By: Giovanni Fontana, Rafael Pecora

Overview of this book

For IT professionals working with Red Hat OpenShift Container Platform, the key to maximizing efficiency is understanding the powerful and resilient options to maintain the software development platform with minimal effort. OpenShift Multi-Cluster Management Handbook is a deep dive into the technology, containing knowledge essential for anyone who wants to work with OpenShift. This book starts by covering the architectural concepts and definitions necessary for deploying OpenShift clusters. It then takes you through designing Red Hat OpenShift for hybrid and multi-cloud infrastructure, showing you different approaches for multiple environments (from on-premises to cloud providers). As you advance, you’ll learn container security strategies to protect pipelines, data, and infrastructure on each layer. You’ll also discover tips for critical decision making once you understand the importance of designing a comprehensive project considering all aspects of an architecture that will allow the solution to scale as your application requires. By the end of this OpenShift book, you’ll know how to design a comprehensive Red Hat OpenShift cluster architecture, deploy it, and effectively manage your enterprise-grade clusters and other critical components using tools in OpenShift Plus.
Table of Contents (23 chapters)
Part 1 – Design Architectures for Red Hat OpenShift
Part 2 – Leverage Enterprise Products with Red Hat OpenShift
Part 3 – Multi-Cluster CI/CD on OpenShift Using GitOps
Part 4 – A Taste of Multi-Cluster Implementation and Security Compliance
Part 5 – Continuous Learning

Understanding the foundational concepts

Let's start by understanding the main concepts related to Kubernetes and OpenShift components and servers. First, any OpenShift cluster is composed of two types of servers: master and worker nodes.

Master nodes

This server contains the control plane of a Kubernetes cluster. Master servers on OpenShift run over the Red Hat Enterprise Linux CoreOS (RHCOS) operating system and are composed of several main components, such as the following:

  • Application programming interface (API) server (kube-apiserver): Responsible for exposing all Kubernetes APIs. All actions performed on a Kubernetes cluster are done through an API call—whenever you use the command-line interface (CLI) or a user interface (UI), an API call will always be used.
  • Database (etcd): The database stores all cluster data. etcd is a highly available distributed key-value database. For in-depth information about etcd, refer to its documentation here: https...